Romans 9:8
That is, not the children of the flesh, these are the children of God: but the children of the promise are accounted for the seed.
John 1:13
who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
Romans 4:11-16
And he received the sign of circumcision, as a seal of the righteousness of the faith which he had when uncircumcised: that he might be the father of all those who believe, though uncircumcised; that to them also the righteousness might be imputed:
Romans 8:14
For as many as are guided by the Spirit of God, they are the sons of God.
Galatians 3:26-29
For ye are all the sons of God through faith in Christ Jesus.
Galatians 4:22-31
For it is written that Abraham had two sons, the one by a bondwoman, and the other by a free.
1 John 3:1-2
BEHOLD, what manner of love the Father hath bestowed upon us, that we should be called children of God! therefore the world knoweth us not, because it knew him not.